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Finding the Fourth Proportional to 314.20, 471.26 and 131.56

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Solution

The fourth proportional to 314.20, 471.26 and 131.56 is: 197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.20 : 471.26 = 131.56 : x
  2. Step 2: Convert to fraction form
    314.20/471.26 = 131.56/x
  3. Step 3: Cross multiply
    314.20x = 471.26 × 131.56
  4. Step 4: Simplify right side
    314.20x = 61,998.97
  5. Step 5: Solve for x
    x = 61,998.97/314.20
  6. Step 6: Final answer
    x = 197.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.